Question

Draw a neat and labelled diagram of a screw gauge. Name its main parts and state their functions.

Answer 1

Main parts and their functions:

1. Ratchet:It advances the screw by turning it until the object is gently held between the stud and spindle of screw.
2. Sleeve:It marks the main scale and base line.
3. Thimble:It marks the circular scale.
4. Main scale:It helps to read the length correct up to 1 mm.
5. Circular scale:It helps to read length correct up to 0.01 mm.